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Message-Id: <20200806060507.730142-1-christophe.jaillet@wanadoo.fr>
Date: Thu, 6 Aug 2020 08:05:07 +0200
From: Christophe JAILLET <christophe.jaillet@...adoo.fr>
To: gregkh@...uxfoundation.org, jirislaby@...nel.org
Cc: linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
Christophe JAILLET <christophe.jaillet@...adoo.fr>
Subject: [PATCH] tty: serial: icom: switch from 'pci_' to 'dma_' API
The wrappers in include/linux/pci-dma-compat.h should go away.
The patch has been generated with the coccinelle script below and has been
hand modified to replace GFP_ with a correct flag.
It has been compile tested.
When memory is allocated in 'get_port_memory()', GFP_KERNEL can be used
because it is only called from a probe function and no lock is acquired.
The call chain is:
icom_probe (the probe function)
--> icom_load_ports
--> get_port_memory
When memory is allocated in 'load_code()', GFP_KERNEL can be used because
it is only called from a .startup function.
icom_open (the .startup function of struct uart_ops)
--> startup
--> load_code
.startup functions are protected using a semaphore and no spinlock is
taken.
@@
@@
- PCI_DMA_BIDIRECTIONAL
+ DMA_BIDIRECTIONAL
@@
@@
- PCI_DMA_TODEVICE
+ DMA_TO_DEVICE
@@
@@
- PCI_DMA_FROMDEVICE
+ DMA_FROM_DEVICE
@@
@@
- PCI_DMA_NONE
+ DMA_NONE
@@
expression e1, e2, e3;
@@
- pci_alloc_consistent(e1, e2, e3)
+ dma_alloc_coherent(&e1->dev, e2, e3, GFP_)
@@
expression e1, e2, e3;
@@
- pci_zalloc_consistent(e1, e2, e3)
+ dma_alloc_coherent(&e1->dev, e2, e3, GFP_)
@@
expression e1, e2, e3, e4;
@@
- pci_free_consistent(e1, e2, e3, e4)
+ dma_free_coherent(&e1->dev, e2, e3, e4)
@@
expression e1, e2, e3, e4;
@@
- pci_map_single(e1, e2, e3, e4)
+ dma_map_single(&e1->dev, e2, e3, e4)
@@
expression e1, e2, e3, e4;
@@
- pci_unmap_single(e1, e2, e3, e4)
+ dma_unmap_single(&e1->dev, e2, e3, e4)
@@
expression e1, e2, e3, e4, e5;
@@
- pci_map_page(e1, e2, e3, e4, e5)
+ dma_map_page(&e1->dev, e2, e3, e4, e5)
@@
expression e1, e2, e3, e4;
@@
- pci_unmap_page(e1, e2, e3, e4)
+ dma_unmap_page(&e1->dev, e2, e3, e4)
@@
expression e1, e2, e3, e4;
@@
- pci_map_sg(e1, e2, e3, e4)
+ dma_map_sg(&e1->dev, e2, e3, e4)
@@
expression e1, e2, e3, e4;
@@
- pci_unmap_sg(e1, e2, e3, e4)
+ dma_unmap_sg(&e1->dev, e2, e3, e4)
@@
expression e1, e2, e3, e4;
@@
- pci_dma_sync_single_for_cpu(e1, e2, e3, e4)
+ dma_sync_single_for_cpu(&e1->dev, e2, e3, e4)
@@
expression e1, e2, e3, e4;
@@
- pci_dma_sync_single_for_device(e1, e2, e3, e4)
+ dma_sync_single_for_device(&e1->dev, e2, e3, e4)
@@
expression e1, e2, e3, e4;
@@
- pci_dma_sync_sg_for_cpu(e1, e2, e3, e4)
+ dma_sync_sg_for_cpu(&e1->dev, e2, e3, e4)
@@
expression e1, e2, e3, e4;
@@
- pci_dma_sync_sg_for_device(e1, e2, e3, e4)
+ dma_sync_sg_for_device(&e1->dev, e2, e3, e4)
@@
expression e1, e2;
@@
- pci_dma_mapping_error(e1, e2)
+ dma_mapping_error(&e1->dev, e2)
@@
expression e1, e2;
@@
- pci_set_dma_mask(e1, e2)
+ dma_set_mask(&e1->dev, e2)
@@
expression e1, e2;
@@
- pci_set_consistent_dma_mask(e1, e2)
+ dma_set_coherent_mask(&e1->dev, e2)
Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
If needed, see post from Christoph Hellwig on the kernel-janitors ML:
https://marc.info/?l=kernel-janitors&m=158745678307186&w=4
---
drivers/tty/serial/icom.c | 32 ++++++++++++++++++--------------
1 file changed, 18 insertions(+), 14 deletions(-)
diff --git a/drivers/tty/serial/icom.c b/drivers/tty/serial/icom.c
index 624f3d541c68..94c8281ddb5f 100644
--- a/drivers/tty/serial/icom.c
+++ b/drivers/tty/serial/icom.c
@@ -138,24 +138,24 @@ static void free_port_memory(struct icom_port *icom_port)
trace(icom_port, "RET_PORT_MEM", 0);
if (icom_port->recv_buf) {
- pci_free_consistent(dev, 4096, icom_port->recv_buf,
- icom_port->recv_buf_pci);
+ dma_free_coherent(&dev->dev, 4096, icom_port->recv_buf,
+ icom_port->recv_buf_pci);
icom_port->recv_buf = NULL;
}
if (icom_port->xmit_buf) {
- pci_free_consistent(dev, 4096, icom_port->xmit_buf,
- icom_port->xmit_buf_pci);
+ dma_free_coherent(&dev->dev, 4096, icom_port->xmit_buf,
+ icom_port->xmit_buf_pci);
icom_port->xmit_buf = NULL;
}
if (icom_port->statStg) {
- pci_free_consistent(dev, 4096, icom_port->statStg,
- icom_port->statStg_pci);
+ dma_free_coherent(&dev->dev, 4096, icom_port->statStg,
+ icom_port->statStg_pci);
icom_port->statStg = NULL;
}
if (icom_port->xmitRestart) {
- pci_free_consistent(dev, 4096, icom_port->xmitRestart,
- icom_port->xmitRestart_pci);
+ dma_free_coherent(&dev->dev, 4096, icom_port->xmitRestart,
+ icom_port->xmitRestart_pci);
icom_port->xmitRestart = NULL;
}
}
@@ -169,7 +169,8 @@ static int get_port_memory(struct icom_port *icom_port)
struct pci_dev *dev = icom_port->adapter->pci_dev;
icom_port->xmit_buf =
- pci_alloc_consistent(dev, 4096, &icom_port->xmit_buf_pci);
+ dma_alloc_coherent(&dev->dev, 4096, &icom_port->xmit_buf_pci,
+ GFP_KERNEL);
if (!icom_port->xmit_buf) {
dev_err(&dev->dev, "Can not allocate Transmit buffer\n");
return -ENOMEM;
@@ -179,7 +180,8 @@ static int get_port_memory(struct icom_port *icom_port)
(unsigned long) icom_port->xmit_buf);
icom_port->recv_buf =
- pci_alloc_consistent(dev, 4096, &icom_port->recv_buf_pci);
+ dma_alloc_coherent(&dev->dev, 4096, &icom_port->recv_buf_pci,
+ GFP_KERNEL);
if (!icom_port->recv_buf) {
dev_err(&dev->dev, "Can not allocate Receive buffer\n");
free_port_memory(icom_port);
@@ -189,7 +191,8 @@ static int get_port_memory(struct icom_port *icom_port)
(unsigned long) icom_port->recv_buf);
icom_port->statStg =
- pci_alloc_consistent(dev, 4096, &icom_port->statStg_pci);
+ dma_alloc_coherent(&dev->dev, 4096, &icom_port->statStg_pci,
+ GFP_KERNEL);
if (!icom_port->statStg) {
dev_err(&dev->dev, "Can not allocate Status buffer\n");
free_port_memory(icom_port);
@@ -199,7 +202,8 @@ static int get_port_memory(struct icom_port *icom_port)
(unsigned long) icom_port->statStg);
icom_port->xmitRestart =
- pci_alloc_consistent(dev, 4096, &icom_port->xmitRestart_pci);
+ dma_alloc_coherent(&dev->dev, 4096, &icom_port->xmitRestart_pci,
+ GFP_KERNEL);
if (!icom_port->xmitRestart) {
dev_err(&dev->dev,
"Can not allocate xmit Restart buffer\n");
@@ -414,7 +418,7 @@ static void load_code(struct icom_port *icom_port)
/*Set up data in icom DRAM to indicate where personality
*code is located and its length.
*/
- new_page = pci_alloc_consistent(dev, 4096, &temp_pci);
+ new_page = dma_alloc_coherent(&dev->dev, 4096, &temp_pci, GFP_KERNEL);
if (!new_page) {
dev_err(&dev->dev, "Can not allocate DMA buffer\n");
@@ -494,7 +498,7 @@ static void load_code(struct icom_port *icom_port)
}
if (new_page != NULL)
- pci_free_consistent(dev, 4096, new_page, temp_pci);
+ dma_free_coherent(&dev->dev, 4096, new_page, temp_pci);
}
static int startup(struct icom_port *icom_port)
--
2.25.1
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